Coil winding machine



Dec. 4, 1956 J. CARROLL 2,772,337

1 COIL WINDING MACHINE Filed May lO, 1954 2 Sheets-Sheet 1 I Z .1 21 a53732 |l|l' Q lul l In] I J 'H' Q 2; 1a 4.41;:

20 if N INVENTOR.

12 'I mesbmll ATTU RNEYS Dec. 4, 1956 J. L. CARROLL 7 2,772,837

COIL WINDING'MACHINE Filed May 10, 1954 2 Sheets-Sheet 2 W )V/Mff .L&\\K

75 v I INVENTOR.

' ML. Calrvll A o N 4; 44

t COIL WINDING MACHINE I James L. cal-mu, Indianapolis Ind.

Application May 10, 1954, Serial No. 428,659 4Claims. (01.242 9 Thisinvention relates to a coil winding machine, and more particularly to amachine for winding choke coils for television uses. p

The object of the invention is to provide a machine which will permit aperson to quickly and easily wind coils such as television choke coilswith accuracy.

1 Another object of the invention is toprovide a coil winding machinewhich includes a motor for rotating a chuck that engages an end of acoil form, there being a counter for recording the number of coils woundon the coil form. p p i Another object of the invention: is to provide acoil winding machine which is extremely simple and inexpensive tomanufacture.

Other objects and advantages will be apparent during the course of thefollowing description.

' -In the accompanying drawings, forming apart of this nate like partsthroughout the-same:

Figure l is a front elevational view of the coil winding machine,constructed according to the present invention, and with parts brokenaway and insection.

Figure 2 is a top plan view of the coil winding machine. t t

Figure 3 is a'sectional view taken on the line 3-3 of Figure l. I l

' Figur'e4 is a fragmentary top plan view showing the application, andin which like numerals are used to desig- Patented Dec. 4, 1956 of thecable 21, and the cable 21 serves to operate a counter 24 which may beof conventional construction. The counter 24 is supported by anupstanding post 25 which extends from a body member 26 that maybesecured to the base 10. The counter 24 includes a scale or indicia 27,and movable pointers 28 and 29 are adapted to indicate on the 'scale 27the number of coil windings that have been wound onthe form 36. Asolenoid 30- is arranged contiguous to the counter '24, and the solenoid30 includes a movable core 31 that is mounted for movement into and outof blocking relation with respect to the movable pointer 28. Thus, withthe core 31 in the position shown in Figure 1, the pointer 28 will notbe able to rotate, but when the solenoid 30 permits retraction of thecore 31, then the finger 28 may rotate. Wires 32 and 33 lead from thesolenoid 30 for a purpose to be later described, and wires 34 and 35leadfrom the motor 19. A casing 37 is arranged contiguous to one end ofthe solenoid 30, and a coil spring 38 is positioned within the casing37.

A sleeve 39 is secured to an end of a drive shaft 49 which extends fromthe motor 19, the drive shaft 49 being rotated when the motor 19 isactuated. The sleeve 39 may be secured to the shaft 49 by means of asecuring element 40, and mounted on the sleeve 39 is a bushing 41, therebeing a set screw 42 for holding the bushing 41 on the sleeve 39.Slidably mounted on the sleeve 39 is a collar 43 which is mounted formovement toward and away from the bushing 41. The collar 43 is providedwith aninterior cutout or recess 48 for a purpose to be later described.A coil spring 44 is circumposed on the sleeve 39, and the coil spring 44is interposed chuck and tailswcaand with parts of the chuck broken awayand in section, the jaws beingclosed.

* Figure 5 isa view similar toFigure 4 but showing the jaws of the chuckopen as when a coil form is to be removed or inserted. l

Figure 6is a sectional-view taken on the line 6-6 of Figure4. a

Figure 7 is a sectional view taken on the line .77 of Figure 4.

Figure 8 is a fragmentary elevational view showing a portion of thechuck and the coil form, and with portionsof the coil form broken awayand in section.

--Figure 9 is a sectional view taken through the solenoid and showingthe relation of the solenoid to the counter.

Figure 10 is aschematic wiring diagram for the pres ent invention. l l

. Referring in detail to the drawings, the numeral .10 designates ahorizontally disposed base which can be madeof any suitable material,and the base 10 may be secured or clamped to a table 11 in any suitablemanner, as for example by, means of the bolts 12. "A clamp 14 is securedbetween the bushing 41 and the collar 43 for normally urging the collar43 away from the bushing 41.

The machine of the present invention further includes a chuck whichembodies a pair of'pivotally mounted jaws 45, and each of the jaws 45includes a transverse finger 47 that is seated in the cutout 48 in thecollar 43. Pins 46 pivotally connect the jaws 45 to the sleeve 39, and afulcrum pin 50 is positioned between the pair of jaws 45.

There is further provided a tailstock 51 which may be clamped to the rod18 by a bolt and nut assembly 52, and the upper end of the tailstock 51is provided with a slit 53 which is adapted to receive a lead 54 whichextends from an end of the coil form 36, Figure 8. An end of the lead 54may be provided with an enlargement 55 in order to prevent the lead 54from being accidentally pulled loose from the tailstock 51. The numeral56 designates the wire to be wound on the coil form 36, and the numeral57 indicates a Wire cutter which extends from the tailstock 51.

A means is provided for moving the collar 43 from the position shown inFigure 4 to the position shown in Figure 5 to thereby cause opening ofthe jaws 45, and this means comprises a yoke 58 which includes a cutout59 through which project the jaws 45, Figures 5 and 6. The yoke 58includes a pair of legs 60 which are arranged contiguous to the outersurface of the collar 43, and an ear 61 is arranged on the lower end ofthe yoke 58. The ear 61 is pivotally connected to a clamp 62 by means ofa bolt and nut assembly 63, Figure 3, and the clamp 62 is mounted on therod 18. A link 64 extends from the yoke 58 and is secured thereto orformed integral therewith, and an arm 65 includes a transverse portion66 which is pivotally connected to the 1ink'64. The lower end of the arm65 is arranged in engagement with a bracket 67 which is adjustablyconnected to a plate 68 by means of bolt and nut assemblies 70, Theplate 68 is hingedly. or pivotally connected to the-bottom of the table11 in anysuitable mannerfas for example by means of the screws 69.Depending 'from the plate 68 and secured thereto is an arm 71 which hasa foot pedal 72 connected thereto. one end connected to the lowersurface of the table 11, while the other end of the coil spring 73 isconnected to the plate 68. a Y The jaws 45 of the chuck are providedwith a cutout 74 which defines a lip, Figure 8, and this cutout '74 isadapted to receive a portion of the wire 56 during the initial phase ofwinding the wire onto the coil form 36. The outer ends of the jaws 45are provided with cutouts or notches 7 for receiving therein an end ofthe lead 76 which can extend from an end of the coil forrn,36. Thenumeral 77 designates a completed coil such as a choke coil for atelevision set, Figure 4, and after the coil has been wound to theposition shown in Figure 4, the end of the wire 56 can be cut ed bybeing arranged in engagement with the Wire cutter 57. Then the completedcoil 77 can be removed and used where desired. The coil form 36 isprovided with a longitudinally extending groove 78, Figure 8.

. The numeral 79 designates .a suitable plug f r eng g ment with asuitable source of electrical energy such as a Wall socket, and supplylines 80 lead from the plug 79 to a pair of switches 81 and 82 for apurpose to be later described.

From the foregoing it is apparent that there has been provided a machinefor use in winding coils such as the coil 77 which can be used as atelevision choke coil. In use one end or lead 76 of the coil form 36 isgripped in the spaces 75 between the jaws 45 with the jaws in theposition shown in Figure 5. The other lead 54 of the coil form 36 isarranged in engagement with the slit 53, and then the jaws 45 are closedand are held in their closed position by means of the spring 44. Then,in a proper sequence the motor 19 can be actuated to cause the wire 56to be fed from a suitable spool onto the lead portion 76 and then ontothe main body portion 36 of the coil form and after the main bodyportion of the coil form has been wound with wire, the other lead 54 iswound and then the wire is cut off on the wire cutter 57. Initially thewire is arranged in engagements with the cutout 74 so as to help startthe winding of the wire on the lead 76.

In actual practice the winding of the coil is started by slipping theend of the wire 56 under the lip or cutout 74, the wire being unwoundfrom a spool and being held by the fingers of the operator. Thus, whenthe chuck including the jaws 45 starts to revolve the coil wire istwisted around the coil form lead 76 and several turns are wound ontothis lead until the twist progresses to the plastic part of the coilform 36. The wire is then lifted up onto the form and the winding of thecoil itself is started. At this point the foot switch 82 is thrown toactivate both the motor 19 and the solenoid 30. When the proper numberof turns are completed, the wire 56 is brought down off the plasticportion and again wound on the other coil form lead 54 for severalturns. During this operation the coil wire is held at a downward angleso that at the finish the wire is under the cut-otf blade 57. This bladeis sharp on the lower edge and is fixed in the tailstock 51. As thewinding is finished, the wire progresses outwardly under the blade 57and can be cut off at any point with an upward motion of the operatorshand holding the wire. The upward snap of the operators hand combineswith the movement of the wire being wound on the form lead to cut thewire in one simple operation.

The present invention will wind coils such as television choke coilsextremely fast and in operation the jaws 45. of the chuck are opened bymeans of the foot pedal 72 which, through the lever mechanism 65, 64 and58 depresses the collar 43 which slides on the sleeve 39. The collar 43is normally in a forward position due to the provision of the spring 44.Thespring pressure on the collar 43 normally holds the jaws 45 closedtightly on the coil form lead 76. The coil form is inserted from the topside of the machine with the motor 19 stopped and A coil spring 73 haswith one lead 76 of the coil form inserted between the open jaws 45 ofthe chuck'and the other coil form lead 54 placed in the slit 53 inthe'tailstock 51. When pressure on the foot pedal 72 is released, thespring 73 will return the parts from the dotted line position of Figure3 to the solid line position of Figure 3 and the coil spring 44 willmove the jaws 45 to he Closed position as shown in Figure 4. Then, withthe U-shaped yoke 58 backed away from the face of the collar 43, thecomplete chuck assembly rotates freely.

After the coil-form'36is in place and the chuck operating the yoke 58.is no longer pressing against the face of collar 43, the windingoperation is started by laying the end of the wire under-the notch 74inthe tip of the jaws 45. Then, by throwing the foot switch 81 to its On"position, the motor 19 only will be actuated so that the chuck willstart to rotate and the coil wire 56 will be wound over the coil formlead wire 76. .Although the motor 19 is running, the counter pointer 28does not move because of the solenoid stop 31. As the coil wire 56progresses up to the edge of the form 36, the machine is stopped by thefoot switch and by means of the handwheel 20. The wire 56 is thenbrought up over the edge of the coil form 36 and the foot switch isthrown to the position so that the'portion 82 of the switch is actuatedwhereby both the motor 19 and the solenoid 30 are actuated. This startsthe motor 19 and releases the pointer 28 on the dial counter and whenthe proper number of turns have been wound, the machine is stopped againand the wire brought down oi the form onto the other lead 54 of the coilform. The motor 19 only is again turned on to wind the wire on the formlead 54 and this also brings the counter back to zero where it isstopped by the solenoid pin 31. The coil wire is snapped in two at theend of the wind by hooking it under the cutter S7. The jaws 45 areautomaticallyopened when the foot pedal is de- Pr ss d.

. Iclam:

1. In a machine for winding coils, a horizontally disposed base, .a pairofxjclamps secured to said base, a horizontally disposed rod extendingbetween said clamps and secured thereto, a motor-supported by said rodand. connected to a source of electrical energy, a handwheel connected.to said motor, a flexible shaft operated by said motor, a counteroperated by said flexible shaft and including movable pointers, asolenoid arranged contiguous.

to said counterand including a core mounted for movement into and .outof blocking engagement with a pointer of said counter, said solenoidbeing connected to said power source, a :driveshaft extending from saidmotor, a sleeve mounted on an end of said shaft, a-bushing mounted onsaid sleeve and secured thereto, a collar, slidably mounted on saidsleeve and mounted for movement towards and away from said bushing, acoil 1 spring mounted on said sleeve and interposed between said bushingand collar, said collar being provided with an inner recess, a chuckincluding a pair of pivotally mounted jaws having fingers engaging saidrecess, said jaws clamping therebetween a coil form lead, -atailstock'supported by said rod and provided with a slit in its upperend for receiving the other coil form lead, and means for operating saidjaws. i

2. The apparatus as described in claim 1, wherein said means comprises aplate hingedly mounted below said base, a yoke arranged contiguous tosaid'collar, a link secured to said yoke and pivotally connected to saidrod, a lever having one end connected to said link and its other endconnected to said plate, and a coil spring conincluding a wire cutterconnected to said tailstock.

4. In 'a machine for winding coils, a base, clamps secured to said base,a rod extending between said clamps and secured thereto, a motorsupported by said rod and connected to a source of electrical energy, ahandwheel connected to said motor, a flexible shaft operated by saidmotor, a counter operated by said flexible shaft and including movablepointers, a solenoid arranged contiguous to said counter and including acore mounted for movement into and out of blocking engagement with apointer of said counter, said solenoid being connected to said powersource, a drive shaft extending from said motor, a sleeve mounted onsaid shaft, a bushing mounted on said sleeve and secured thereto, acollar slidably mounted on said sleeve and mounted for movement towardsand away from said bushing, resilient means mounted on said sleeve andinterposed between said bushing and collar,

said collar being provided with an inner recess, a chuck includingpivotally mounted jaws having fingers engaging said recess, said jawsclamping therebetween a coil form lead, a tailstock supported by saidrod and provided with a slit therein for receiving the other coil formlead, and means for operating said jaws.

References Cited in the file of this patent UNITED STATES PATENTSBaldwin Jan. 5, 1954

